Django customed user model createsuperuser error

Question

I'm newb to python django. I am making a small web page. Here is a piece of code i'm running. I want to make cumtom user model and use it to resigter with music genre, instrumet and nickname. But with this code, even i did all the migrations, doesn't work well. After the email input, an error is keep occuring. The error is <django.db.utils.OperationalError: no such column: accounts_user.genre>. Please help....

<models.py>

from django.db import models
from django.contrib.auth.models import BaseUserManager, AbstractBaseUser

class UserManager(BaseUserManager):
    def create_user(self, email, genre, nickname,instrument, name, password=None):
        if not email:
            raise ValueError('Users must have an email address')
        user = self.model(
            email=self.normalize_email(email),
            genre=genre,
            nickname=nickname,
            instrument=instrument,
            name=name,
        )
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_superuser(self,nickname, email,password):
        user = self.create_user(
            email,
            password=password,
            nickname=nickname,
        )
        user.is_admin = True
        user.save(using=self._db)
        return user

class User(AbstractBaseUser):
    email = models.EmailField(
        verbose_name='email',
        max_length=255,
        unique=True,
    )
    objects = UserManager()
    genre=models.CharField(max_length=100)
    instrument=models.CharField(max_length=10, default='')
    nickname = models.CharField(max_length=100, default='')
    is_active = models.BooleanField(default=True)
    is_admin = models.BooleanField(default=False)
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['instrument']
    def __str__(self):
        return self.email
    def has_perm(self, perm, obj=None):
        return True
    def has_module_perms(self, app_label):
        return True
    @property
    def is_staff(self):
        return self.is_admin

and here is my views.py <views.py>

from django.shortcuts import render, redirect
from .models import User
from django.contrib import auth

def signup(request):
    if request.method == "POST":
        if request.POST['password1'] == request.POST['password2']:
            user=User.objects.create_user(request.POST['username'], password=request.POST['password1'])
            auth.login(request, user)
            return redirect('melody')
    return render(request, 'signup.html')
def create(request):
    new_user=User()
    new_user.email=request.POST['email']
    new_user.nickname=request.POST['nickname']
    new_user.genre=request.POST['genre']
    new_user.instrument=request.POST['instrument']
    new_user.save()
def login(request):
    if request.method == "POST":
        username=request.POST['username']
        password=request.POST['password']
        user=auth.authenticate(request, username=username, password=password)
        if user is not None:
            auth.login(request, user)
            return redirect('melody')
        else:
            return render(request, 'login.html', {'error': 'username or password is incorrect'})
    else:
        return render(request, 'login.html')

<admin.py>

from django.contrib import admin
from django.contrib.auth.models import Group
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from .forms import UserChangeForm, UserCreationForm
from .models import User

class UserAdmin(BaseUserAdmin):
    form = UserChangeForm
    add_form = UserCreationForm
    list_display = ('email', 'instrument', 'genre','nickname', 'instrument', 'is_admin')
    list_filter = ('is_admin',)
    fieldsets = (
        (None, {'fields': ('email', 'password')}),
        ('Personal info', {'fields': ('instrument', 'nickname','genre')},),
        ('Permissions', {'fields': ('is_admin',)}),
    )
    add_fieldsets = (
        (None, {
            'classes': ('wide',),
            'fields': ('email', 'instrument', 'genre','nickname','password1', 'password2')}
         ),
    )
    search_fields = ('email','nickname','genre','instrument',)
    ordering = ('email',)
    filter_horizontal = ()

admin.site.register(User, UserAdmin)
admin.site.unregister(Group)

<forms.py>

from django import forms
from django.contrib.auth.forms import ReadOnlyPasswordHashField
from .models import User

class UserCreationForm(forms.ModelForm):
    password1 = forms.CharField(label='Password', widget=forms.PasswordInput)
    password2 = forms.CharField(
        label='Password confirmation', widget=forms.PasswordInput)

    class Meta:
        model = User
        fields = ('email', 'instrument','nickname', 'genre','instrument')

    def clean_password2(self):
        password1 = self.cleaned_data.get("password1")
        password2 = self.cleaned_data.get("password2")
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError("Passwords don't match")
        return password2
    def save(self, commit=True):
        user = super().save(commit=False)
        user.set_password(self.cleaned_data["password1"])
        if commit:
            user.save()
        return user

class UserChangeForm(forms.ModelForm):
    password = ReadOnlyPasswordHashField()
    class Meta:
        model = User
        fields = ('email', 'password', 'instrument', 'genre','nickname','is_active', 'is_admin')
    def clean_password(self):
        return self.initial["password"]